title: An in-reflection strain sensing head based on a Hi-Bi photonic crystal fiber.
abstract: A photonic crystal fiber-based sensing head is proposed for strain measurements. The sensor comprises a Hi-Bi PCF sensing head to measure interferometric signals in-reflection. An experimental background study of the sensing head is conducted through an optical backscatter reflectometer confirming the theoretical predictions, also included. A cost effective setup is proposed where a laser is used as illumination source, which allows accurate high precision strain measurements. Thus, a sensitivity of ~7.96 dB/me was achieved in a linear region of 1,200 μe.
authors.affiliation: Department of Electric and Electronic Engineering, Universidad Pública de Navarra, Pamplona 31006, Spain. sergio.rota@unavarra.es
authors.forename: Sergio
authors.initials: S
authors.lastname: Rota-Rodrigo
authors.forename: Ana M R
authors.initials: AM
authors.lastname: Pinto
authors.forename: Mikel
authors.initials: M
authors.lastname: Bravo
authors.forename: Manuel
authors.initials: M
authors.lastname: Lopez-Amo
mesh_terms: D055119:Elastic Modulus; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007368:Interferometry / Q000295:instrumentation*; D010783:Photometry / Q000295:instrumentation*; D017785:Photons; D012031:Refractometry / Q000295:instrumentation*; D013314:Stress, Mechanical; D014159:Transducers